Drying-machine.



W. H. RIHL 6L E.'B. AYRES.

DRYING MACHINE. APPLICATION FILED AUG. 1I. I9I4.

SHEET w. H. RIHL & E. B. AYRES.

DRYING MACHINE.

APPucATloN man Aua.11. 1914.

Patented Nov. 23, 1915.

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W. H. RIHL & E. B. AYRES.

VDRYING MACHINE.

APPL|CAT|0N FILED Aus.11. 1914.

Patented Nov. 23, 1915.

LLLLLL r n sTaTs T TTT -WILLIAM H. lRIIEEL ANI) rlIINVQOD B. AYRES, OF PHELADELPHIA, PENNSYLVANIA,

ASSIGNORS TO THE PHILADELPHIA TEXTILE MACHNERY COMPANY, OF PHILA- DELIHIA, PENNSYLVANIA., A CORPORATION 0F PENNSYLVANTA.

Specification of Letters Patent. Patqmtqd NOV, 239 1Q/15,

Appliationled August 11.,.l914. l Serial-No. 856,274. i

T0 alt tblwm t may concern;

Be it known that'we, WILLIAM H. RIHL and Enwoon B. Ariens, citizens of the United Sta-tes, and residents of Philadelphia, county of Philadelphia, State of Pennsylvania, have invented certain Improvements in Drying-Machines, of which the following is a specification.

@ur invention relates to certain improve? ments in drying machines `of the type in which the material isconveyed through a chamber and is subjected to the action of heated air, which is circulated through the chamber. This invention is particularly adapted for drying leather board, although it will be understood that it can be used for drying pottery, bricks, and other material, in Whi'ch the moisture is to be slowly removed from the articles. Y

One object of the present invention is to design the drier so that the moisture is slowly extracted from the material during the first steps in the drying operation by currents of air passing transversely from one side dof the drier to the lother and y.

through the layers of the materialbeing dried'.

A further object of the invention is to provide means for completely drying the material after the excess moisture has been removed?) A still further object of the invention is to remove the moisture at given intervals by the proper circulation of air from one side of the drier to the other.

In the accompanying drawings Figure 1", is a side view of onehalf of our inrproveddrier; Fig. l", is a side view of the other half of the drier; Fig. Qt, is a plan view, partly in section, of part of the drier illustrated in Fig. la; Fig. 2", is a plan view of part of the drier illustrated in Fig. 1b; Fig. 3, is a transverse sectional View of the drier on the line 0 0., Fig. la; Fig. 4, is a side view of one of the trucks, which is used when leather board, or similar material, is being dried; Fig-5, is an end view of one of the. trucks; and Fig. 6, is a longitudinal sectional View of one of the trays which is gitudinal partitions 4f, as illustrated in Fig.

"3. In the two side compartmentsl are coils ofheating pipes 5.` These coils are made in sectionsthroughout 'the entire length of the machine and fthe sections are spaced apart 4to allow for the location of the driving drier and may be driven by power in any suitable manner. In the first portion of the apparatus there is no inlet opening for air from the outside, so that the moist heated-air is retained in the first portion of the drier in order to prevent the rapid drying of the material, as better results are attained if it is not quickly dried.

1n the present instance there are three outlet. ducts 9, 1i and 13, spaced a certain. distance apart according to the material being dried. ln the first duct 9 is an ex haust fan lOfand inthe second ductll is an exhaust fanl, and in the third duct 13 is an exhaust fan 14. All these fans are power driven, preferably in the manner shown in Fig. la.

n the drying chamber 3 of the apparatus are tracks i5. 1G, 16 are trucks having wheels 17 adapted to the tracks. In the present instance, there are two tracks located side by side as the trucks are comparatively narrow, but it will be understood that a single track may be used in some instances, extending the full width of the drying chamber. 0n each truck is a frame 18 having rails 19 spaced a given distance apart to receive trays 20, which are perferated and are so arranged that each tray will properly support a sheet of leather board, or other material When the trays are assembled there is a clear space between each tray so that the warm and hot air will pass in between the trays, thoroughly heating and drying the material carried thereby.

The construction illustrated in Figs. 4

and, we prefer to use in drying sheet material, but where bulk material, such as bricks, drain pipes, and the like, are to be dried we preferably use trucks Without the framework.

In operating our improved drier, the

leather board, for instance, is fed into the machine at the end marked and the air circulates through the layers of the board, heating the board and removing therefrom a certain proportion of themoisture. This moisture is not allowed to escape immediately, but circulates for a certain leiigth of time until it escapes through the-first outlet lduct 9 in the roof.. The inlet of fresh air being only at the discharge end of the machine, and this air-makes its way through the machine toward the inlet end so as lto prevent moist air circulating at the discharge end. A portion of this air, after it takes up the moisture, escapes through the third outlet duct 13 and a portion, with additional moisture, escapes through vthe second duct 1l, and the remainder escapes -l through the first duct 9, as described above.

Consequently, the material is subjected, dur.- ing the first portion of the treatment, to heated moist'air, then the moisture 1is gradually decreased so that when the material reaches the outlet end of the apparatus it is free of moisture and dry. This method of drying prevents the leather board, plastic and like material from warping or cracking, due to the rapid removal of moisture.

We claim l, The combination in a drier, of a casing; two longitudinal partitions in the casing forming three compartments, the central compartment being the drying chamber and the side compartments being the heating chambers; a series of heating pipes in' the hea-ting chambers, each partition having a seriesof fan openings, the openings in one partition being out of line with the fan openings in the other partition; power the other; tracks in said chamber; trucks arranged to travel on said tracks and to carry the material to be dried; heating pipes in the side chambers; aseries of fan open* ings in the longitudinal partitions, the fan openings inone partition being out of line with those in the other partition; a power driven fan in each opening; an inlet for fresh air at the discharge end of the drier; an exhaust ductcommunicating with the interior of. the drier near the center; and two exhaust ducts communicating with the interior of the drier, one of said ducts being spaced a distance from theirst mentioned 1 duct and the other duct being comparatively close to the last. mentioned duct, so that the moist air is removed from the apparatus afterit has been retained a given length of time and prior to the final removal of the material from the drier, so that the material under treatment will be slowly dried with a certain amount of moisture retained therein during the firstv part of the operation, the; remainder of the moist air being removed prior to the final drying with the hot air.

3. The combination in a drier, of a casing vhaving two longitudinal partitions therein forming a central drying chamber and two Side heating chambers; a series of sections of heating pipes in the side chambers and spaced apart, each longitudinal partition having a series of fan openings, the fan openings in one partition being out of line with those of the other partition; a series of transverse fan shafts; fans on the shafts mounted in the fan openings in the parti- ,tions, the fan shafts being located in the 4space between the sections of the heating pipes; a series of exhaust ducts communicating with the upper portion of the drying chamber and spaced apart and located near the discharge end of the apparatus, so that the `drying air will -retain a certain amount of moisture during the first part of the drying operation, but during the latter ,part of the drying operation the air will be free from moisture. In testimony whereof, we have signed our names to this specification, in the presence of two subscribing witnesses.

VILLIAM H. RIHL.v ELVVOOD B. AYRES. `VVitnsses:

VILLS A. BURRowEs, WVM. A. BARR. 

